feat: add multi stream append support #49

Job	Run time
build / Build (8)	1m 28s
build / Build (11)	1m 31s
Tests (CI) / load_configuration / load	4s
build / Build (17)	1m 29s
Tests (CI) / Secure (PersistentSubscriptions)	1m 33s
Tests (CI) / Secure (Streams)	1m 43s
Tests (CI) / Cluster (PersistentSubscriptions)	10s
Tests (CI) / Cluster (Streams)	10s
Tests (CI) / Single node (Streams)	1m 31s
Tests (CI) / Single node (MultiStreamAppend)	1m 33s
Tests (CI) / Single node (PersistentSubscriptions)	1m 32s
Tests (CI) / Cluster (MultiStreamAppendTests)	7s
Tests (CI) / Single node (Telemetry)	1m 30s
	14m 21s

Provide feedback